Belt and method of making it



BELT AND METHOD OF MAKING IT -Filed Dec. 17, 1930 2 Sheets-Sheet-l 54 g //V VENTU/P. I IFM 1 137 mi Jam-8, 1935. SJ FINN BELT AND METHOD OF MAKING IT 2' Sheets-Sheet 2 Filed Dec. 17, 1930 WWW Patented Jan. 8,1935

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-fhoe Machinery-Corporation;Baterson,-N. FJ.,

101: prises two endless belts, each having projections from its outer 'surface', th'ese belts receivingwoated work-pieces -between" their ad} acent iaces withj thecoatedsides down aind-kielivefing said: pieces with i the A coated" sides up, I a result of turning through l80between their receiving and' deliv ering ends Ifcanvas orlll ike textile matetial is used the.fcustoinary belt formg flanged-pulleys are necessarytfor their support andj retentionfibut l the turniof the belts may cause-the-ir edges to press 3'01 against the flanges, so said:edges become firushed andsoftened, until :the belts ride over th fiaiiges" and are thrown from the; pulleys. ll Rubber belts, when new; willilremain upon crowned -pulleysmore 1' satisfactorily than' canva's" belts but mutan -ss result of use andiareiapt to-run off thein supports.

This stretchingial'so loosens the work-engaging projections, and a they may fa'll 1 from 'the i belts;

With anyttypeefsbelt made endless by the lapping and cementingitogether of its end'sfthe play: and

3H stressesto whichi theseinver ting devices are'sub 1 tion. 1.:

jected areipeculiarly iiia'bleto cause their sep is:

a strong rand durable albelt free from su'ch ob'jec- 335 tionsfas just indicatedw As hereiniillustratedimy improved belt comprisesaa novel arrangementvof coiled inner, and outersections withcanr adhesive? substance securing together adjacent :;convolu-; tions of each, sectionand :the sections to each,

4m other. The body, of each section preferably consists of textile A material; canvas T webbing; for: :ex: ample, and the adhesive substance maybe vulcanizable, as rubbe or rubber compound; As herein disclosedQthe webbingfca'riies upononejface a; t 45 layerpfrubbercementfluponwhiehis superposed a layer ofrubbeitjfi This coating 'secures the'cona volutions of eachsection and connects "the sec tions, when such independent portions ar em 'ployecl. Throughone of the' beltsections'fand to this is thebroajdef aspect of-theinvention re; gardless ofthe manner infwhich the sections are formed and secured to each other; project workengaging means, which I: have'shown' asdufnished by staples, such means: having a a portion betwe n 1 5.51; the belt-sections; 5 Belts jsoxconstructed epossess (m iao;

1 stiength, qneithe r breaking their beuoming distorted n use, and their work-engaging spre jGtiOIlSFflIQ'fi-BMY held against'displacement.

rAnother objectof this invention is *torproduee,

in ameflieient manner; 'belmi='ofthe :ohai acter just; outlined. 3T0 this' -end liform two coils or be1t= sections'iof :astrip-material, join the "convolution-s of' -each coill, assemble these'co'ils one'within the coil-may be .woundiupon a collapsible toning-from is preferably coated-with am-adhesive; as rubber or-other vulcanizable substance-thefuncoatedside being sou-twhen said strip tiswou'nd -upon the form- In 118 particular; method disclosed, pressure is appliedl torthe convolutions of the-moi! to join them. Two 1, #of, the; formed coils are assembledone within another -;-and 'subiiected to pressure,

tufty'lihe adhesive Lioining the convolutions'of i the i coils=-and;sai' l coils to each other ma be treated chemica 'ywto -1perfeot'the conneetionwsimuitane ously withthe meohanioaltreatment bypressure.

{ Foriequipping 'thez-beltwith workengaging .-projections, these arerrmounted upon' the; outer' coil a i 1 or]section,a'extendingi*outwardlyrtherefrom. If My invention has aszan object theprovi'sion 'ofi stapleszare employedto furnish these projections",

thezlegscareinserted through the outerwsec'tionQ and-the;yokescontactw withiboth this and the innen sectionl improved :belt'inay be produced in this-way economically, while the resulting artlci'e has 'allits eleinents securely joined in a duya i t v F11 1 the accompanying drawings isil'lustratedfa armuiaflorm-or-the beltio'f this invention to;

Fig. 4 illustrates in pe spectivethe-step ofjfortn ing1 the eonstituenticoi-ls; V Fig. -5wsimilarlyexhibits twocoilsor-sections; i

Fig. 6 is a side elevation oflthe holder forthe assembled coils; it t edin St s;

the stepho f assmhlingi 10: Which it is removed for assembling, The strip 1 i I base from the reel, support the journals of a th'e""bolts 28, the section 24 may be allowed. to

' Fig. 7 is an enlarged detail in side. elevation of the expanding device of the holder; and

Fig. 8 is a broken side elevation of the vulcanizing chamber.

In making a belt B in accordance with this invention, a strip of material 10 '(Fig. '4), equal in width to that of the completed article and preferably of such textile materiaL as canvas webbing-is taken from a reel 12, which m y be rotatably mounted on standards 14 rising from a base 16. Other standards 18, spaced upon the flanged cylindrical form F. This form is collapsible, having a main or body-portion .22 and a section 24 normally securedin plaoe-by slotted plates 26 fixed to the section and engaged by bolts 28 passing throughopenings in the body.

vWith the portions of the form attached to each other, asillustrated 4, the device isready;

for a winding operation, and then, by loosening cated at 36, the coated or adhesive side being outward. Theform is then rotated until one convolution of the strip has been applied, and as the winding of" the second turn progresses, a

' thin rubber cement or a rubber solvent, as benzine, is'placed upon the coated surface 38 of the first convolutionand a thicker rubber cement upon the uncoated surface 40 of the second.

This causes them to-adhere more perfectly. A coil of two turns having been thus formed and cut transversely to separate it from the supply,

the layers may be pressed together, as'by rolling, after which the form is collapsed byloosening the screws 28 and movingin the section 24, and

' the completed coil removed. A second coil 441s similarly produced, and one of thesecoilsor beltsections, as 42 after .it has, been turned with the-coated side'in, is supplied with wo'rk-engag ingprojections. An effective device for this pin-- pose consists of a staple, such as is illustratedin" v Fig. 3 of the drawings. The belt-section 42hav'-. ing been prepared for their -reception-by being perforated-at the desired'pointa-the legs 48. of

the staples are inserted through the perforations,

withthe yokes 50 resting against thecoated surface 40, which,.in this staple-carrying portion,

is at the inside. The yokes of the staples may lie either; transversely.- or longitudinally of: the

- belt, spaced from one another as is most effective.

Lateral projections 52, at opposite sides of each staple-yoke at the center aid, by their contact.

with'the surfaces of the section 42 and the companion section .44 when brought together, in preventing the legs from tippingv and furnish better i engagement'withthe coating ofthesections.

Thesection '42carrying the projections and the section 44 are now assembled, the latterqbe ing inside the former and with the coating 32 outward for contact with the staple-yokes 50 andwith-the corresponding coating upon the associated section. Each coated facehas been preliminarilytr'eated with thin rubbercement or a rubber solvent. This assembling operation is illustrated: in .Fig.-:5. V L,

One within the other and withatheir fedges The strip is led from the reel 12 and secured t'o-the 'completeform F, as is indi registering, the sections are placed upon an ex- I pansible holder H, in the form of a flexible ring 54, as appears in Figs. 6 and 7. The adjacent ends of the ring are spaced from each other and to them are secured blocks 63, 63. From one of the blocks is a segmental extension 60 projecting within the adjacent end of the ring and guided. between spaced lugs 62 projecting in- Wardly from-said ring. This prevents lateral displacement of the ends. Projecting at one side .of the blocks are rotatable studs 64 and 66, through each of which is a transverse opening. .A rod.68 is threaded through the stud 64 and has a smooth portion guided in the stud 66. Threaded upon the rod is a collar '70, and between this andthe stud66 is interposed a helical spring 72.

between the stud 66 and the spring '72, and further outward pressure may be applied to they supported belt by turning the collar 70 upon the rod; The. pressure thus produced upon the work is substantially uniform about its circumference and is. radial' with respect to the axis of the h de Oneormoreof the composite belts B thus arranged ;upon holders H are placed inachamber 76 (Fig. 8), the removable head 78 offlwhich is so applied that the connection to the outer air is sealed. Then there is introduced into the chamber through apipe 80, under a pressure, say of thirty pounds, a fluid, which may be steam or vair, 'at =a-temperaturewhich will effect the vulcanization of the rubber and rubber compoundbetween-the belt-sections and their convolutions. This fluid-force acts positively and oppositelyto the expansion'of the holder H, or inwardly gtowardthe center, the two effectively pressing together all the layers of the belt-sectionsto produce, their uniform adhesion. At

the same time, the heat of the fluid vulcanizes thev rubber interposed-between the layers to hardenand render it more permanent.

After the required time of. treatment, the-hold er or holders H are removed from the chamber tively-resists' deformation. As neither the inner nor outer surfaces of the belt carries an adhesive coating, the friction between the adjacent inner surfaces {of associated" belts, where these make their inverting. turn infuse, will be minimized,

and drops of cement from the coated work-pieces conveyed willhave little tendency tostick to the outer surfaces. Secured bytthe insertion of both legs in the outer belt-section, with, their yokes and yoke-projections contacting at one side with saidouter section and at the opposite side with 'thez inner section, and embedded in multiple layers of vulcanized rubber, the workingthe expansion of the holder, placing the holder and .coil within "a I chamber, and pressureain' saidchamben- V V 22. The method of making belts, which consists in assembling. endless belt-sections of material coated with anadhesive one'rwithinanother, placing the sections'upon a holder, plac-- ing the holder and s'ection withinachamber, and creating fluid-pressure in .said'charnbergl 2: t

23. The method of making belts,"-i-which-iconsists in winding material coated with an adhesive to form two belt-sections, treating .the outenand inner surfaces of the respective" sections ltoeincrease their. adhesion, assembling the sections with the adhesive surfaces.in contact, andap' plying to the inner section a force exerted outwardly.

sive toform two belt-sections;inserting staples in one of the; sections with the-.legs projecting: outwardly, treating theouter. and inner surfaces;

of the respectivecoils to increase theirqadhesion; assembling the coils with the. adhesive surfaces in contact and the staple-legs at the outside, and. applying to the inner section a force exerted outwardly. f N

. 26. The method of making belts, which. con-J sists in windingmaterial coated with anxadhesive' to form twoybelt-sections, treating the outer and f inner surfaces of the respective coilsto increase.

their adhesion,assembli ng the coils withthe ad- I hesive surfaces in contact, applying to the inner section a force exerted outwardly, and simultaneously applying to the outer section a force exerted inwardly. I r

.. 27. vThetmetliod of making belts, which con.

sists in winding coatedwebbing upon a-form to furnish. two belt-sections, the coating; of one section being at the outer side and the coating of the other section at the inner side, removing thetwo sections from the form, assembling them.

upon an expansible holder with the coated faces in contact, causing the expansion of the holder,

yplacingthe holder and'sections in a chamber,

and. creating fluid-pressure in said chamber.

:28; The method of making belts, 'whichconsists in windinga coil of material coated with rubber,:and'.applying' to the coil simultaneously a vulcanizing temperature and pressures effectiveto force the material of the coil in opposite,

directions. v

29. .'Ihe.method of: making belts, which consists -in.winding a coilof material coated with rubber, and submitting the coil simultaneously to the pressure of a fluidat a vulcanizing tem perature and to an independent pressure ex erted from within the coil outwardly. .30...The method of. making belts, which consists in winding two coils of webbing having their'convolutions connected by rubber, assembling the coils one within the other, placing the 'assembledcoils upon an-expansible holder, causing. the. expansion of the holder,.placing the holder in a chamber, and introducing into the chamber fluidunder pressure and at a vulcanizingtemperature.

31. The method .of making belts, which consists. in. winding twowcoils of webbing having their. .convolutions connected by rubber, insertingstaples through one coil with their legs extend-v ing outwardly and their yokes. resting. against the coated surface, assembling the coils one within the other, the coated surface of the inner coil contacting with the .staple-yokes, placing the assembledcoils upon an expansible holder, causing the expansion of the holder, placing the holder in. a chamber, and introducing into the chamber-fluid under pressure and at a vulcanizing temperature.

SIDNEY J. FINN. 

